Maybe I am mistaken, but wasn't the update to Document Server 5.0 supposed to be different looking? Kinda like MS OFfice with tabs for navigation?

I have a Nextcloud implementation with the integration app (1.1.5) and a brand new install of OnlyOffice document server 5.0.3. It is running great but when I look at the appearance of 5.0.3 on the OnlyOffice website it looks very different.

At present a new tabbed interface is available for commercial versions only. For open source users we have preserved our simple interface but give access to almost all new features, including pivot tables for viewing and 69 new formulas in spreadsheets, notes in presentations, new plugins in documents, and a lot of improvements and bug fixes.